05-29-2021, 10:44 AM
I managed to get a wired headset since the store is open now and do a recording with it. I wasn't able to get a very long recording yet (important for getting very good spectrograms) but was able to some preliminary ones.
The bad news is that the problem is still there. The good news is that it is A LOT quieter with the headset. The spectrogram is below. There are a lot more spikes visible in it because the problem is quieter overall (easier to see other spikes). Also, the recording was shorter and that means a noisier looking spectrogram.
![[Image: spectrogram_Freja_Nordsiek_2021_05_29_2G...eadset.png]](https://raw.githubusercontent.com/frejanordsiek/pinephone_call_noise_investigation/main/plots/spectrogram_Freja_Nordsiek_2021_05_29_2G_call_headset.png)
Going to do a test call in the location with the very bad signal that had the problem the worst later this week. Also going to try to get some very long recordings to really narrow in on the exact frequency of the frequency comb.
Later, I need to try the code at https://xnux.eu/devices/feature/audio-pp.html and start tweaking the audio settings.
The bad news is that the problem is still there. The good news is that it is A LOT quieter with the headset. The spectrogram is below. There are a lot more spikes visible in it because the problem is quieter overall (easier to see other spikes). Also, the recording was shorter and that means a noisier looking spectrogram.
Going to do a test call in the location with the very bad signal that had the problem the worst later this week. Also going to try to get some very long recordings to really narrow in on the exact frequency of the frequency comb.
Later, I need to try the code at https://xnux.eu/devices/feature/audio-pp.html and start tweaking the audio settings.
